User Manual

7521/2/2A/3/4/7 Series Hardware User’s Manual, Ver. 1.5 Sep/2002, 7Mh-001-15 -----40
Comparison table of 7521, 7522 & 7523 series:
7521(D) 7522(D) 7523(D)
CPU clock 80188, 20M Hz 80188, 20M Hz 80188, 20M Hz
SRAM 128K 128K 128K
Flash ROM 256K 256K 256K
COM1 RS-232
or RS-485 with
self-tuner inside
RS-232
or RS-485 with
self-tuner inside
RS-232
or RS-485 with
self-tuner inside
COM2 RS-485 with self-tuner
inside, 3000V isolation
RS-485 with self-tuner
inside, 3000V isolation
RS-485 wtih self-tuner
inside, 3000V isolation
COM3 No Com3 RS-232 (txd,rxd,rts,cts) RS-232 (txd,rxd,rts,cts)
COM4 No Com4 No Com4 RS-232 (txd,rxd)
RTC No No No
64 bits hardware
unique serial
number
No No No
EEPROM 2K bytes 2K bytes 2K bytes
D/I(3.5V~30V) 3 channels 3 channels 2 channels
D/O(150mA) 3 channels 1 channel 0
I/O expansion bus Yes No No
Support AsicKey Yes No No
Operation system MiniOS7 MiniOS7 MiniOS7
Programming
language
TC/MSC/BC TC/MSC/BC TC/MSC/BC
Program
download
COM1 COM1 COM1